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• (MCL) set by the US EPA for nitrate as NO3 is 45 mg/L (10 mg/L-N). The MCL for <br /> DBCP is 0.2 µg/L. <br /> On-Site Wells <br /> Two domestic wells and two irrigation wells exist on the Site. Eight well permits were <br /> identified for the Site at the San Joaquin County Environmental Health Department: <br /> • February 1976 permit for new irrigation well north of Wildwood Road (14629). A <br /> note on the permit states that the inspector was "unable to determine where old <br /> well was located." <br /> • December 1976 permit for pump repair at irrigation well south of Wildwood Road <br /> (14629; may be off-site to east). <br /> • December 1976 permit for pump repair at irrigation well north of Wildwood Road <br /> (14629). <br /> • December 1976 permit for pump repair at irrigation well south of Wildwood Road <br /> (14629). <br /> • September 1977 permit for pump repair at domestic well (14629). The permit <br /> notes that the "owner would not properly seal old well a few feet away and take <br /> out of service." <br /> • May 1980 permit for pump repair at domestic well (14629). <br /> • August 1981 permit for pump repair at irrigation well north of Wildwood Road <br /> (14629). <br /> • July 2012 permit for pump replacement at domestic well (14629). <br /> • October 2013 permit for pump repair at irrigation well (14629). <br /> Copies of the permits have been included in Appendix 4 of this report. <br /> Water Sample <br /> Live Oak collected a water sample from the domestic well on December 19, 2016. The <br /> sample was analyzed for nitrate and dibromochloropropane (DBCP) per San Joaquin <br /> County Environmental Health Department policy. <br /> As required by the laboratory, the sample was collected in a plastic container and two <br /> glass vials for nitrate and DBCP analysis, respectively. A trip blank was also utilized. <br /> The sample was placed on ice and transported under chain of custody to FGL <br /> Environmental, Stockton. <br /> Nitrate was detected at a concentration of 16.8 mg/L-N in the water sample. DBCP was <br /> not detected in the sample. <br /> Nitrate is commonly detected in shallow ground water aquifers of the Central Valley. <br /> Application of fertilizers, livestock waste, and untreated septic tank waste can all <br /> • contribute to nitrate in ground water. Nitrate is mobile and tends to accumulate in <br /> shallow ground water zones. Based on work in the Sacramento Valley from the early <br /> LOGE 1702 Page 4 <br />